On the definition of subspecies, and issues of taxonomy
Generally, we are assessing indicators at the species level. However,
there are frequent revisions of taxonomy (lumping and splitting of
species) and some species groups are better studied and thus more finely
examined than others. Consequently, what may be considered a subspecies
by some experts, may be considered a species by others. In such
situations, assessors may include subspecies if the entity is an
important unit for that country (e.g., it has separate reports or
protection or Red List status.